From the manual:
Zero Point Calibration The โZero Pointโ is the programmed point that the unit will return to each time the Auto Level feature is used. The โZero Pointโ must be programmed prior to using the Auto Level feature to ensure the proper operation of the system. NOTE: Prior to starting this procedure, double check all connections on the controller, jacks, and touch pad.
1. Manually run the jacks to level the unit. This is best achieved by placing a level in the center of the unit and leveling it both front to back and then side to side. (See โBasic Jack Operationโ for instructions on how to manually operate the system).
2. Once the unit is level, turn off the touch pad.
3. With the touch pad off, press and release the โFRONTโ button (Fig. 1G) ten (10) times and then press and release the โREARโ button (Fig. 1J) ten (10) times.
4. The touch pad will flash and beep and the display will read โZERO POINT CALIBRATION ENTER to set, Power to Exitโ (Fig. 5).
5. To set the current position as the zero point, press the โENTERโ button (Fig. 1C).
6. LCD display will read โZero Point stability checkโ (Fig. 6).
7. LCD display will read โZero point set successfullyโ once process is complete (Fig. 7).
8. The system will set this point as its level state and the touch pad will turn off.
Edit:
Here's a link to some helpful YouTube videos. After working with my Lippert 6 point level system, I still can't do it right. I have check the manual and these videos all the time! Duh!
Click here.